Multistage capacitance salt dialysis device for reclaimed water treatment

Abstract

The invention discloses a multi-stage capacitance salt dialysis device for reclaimed water treatment, which comprises a treatment water tank for capacitance salt dialysis of reclaimed water and a placing rack for placing the treatment water tank, an adsorption desalination assembly is arranged in the treatment water tank, and the adsorption desalination assembly comprises a first electrode plate and a second electrode plate, each of the first electrode plate and the second electrode plate structurally comprises a modified activated carbon layer, an ion exchange membrane layer and a nano metal catalyst layer in sequence from inside to outside, and a spoiler is arranged at the top end in the treatment water tank. Through the composite electrode material composed of the modified activated carbon layer, the ion exchange membrane layer and the nano-metal catalyst layer, the adsorption capacity on various ions is enhanced; a plurality of treatment water tanks on the placement plate are connected in parallel and in series, so that the desalting depth can be improved, the treatment water quantity can be considered, and the treatment efficiency is further improved; due to the arrangement of the spoilers, the reclaimed water is in full contact with the electrodes, and the desalting efficiency and the special ion removal capacity are effectively improved.

Description

Technical Field

[0001] The present invention relates to a capacitive salt dialysis device, specifically a multi-stage capacitive salt dialysis device for reclaimed water treatment, belonging to the technical field of water treatment. Background Art

[0002] Reclaimed water reuse is of great significance for alleviating water resource shortage and improving water resource utilization efficiency. As a key device for reclaimed water treatment, the multi-stage capacitive salt dialysis device can effectively remove salts and impurities in reclaimed water and improve the quality of reclaimed water.

[0003] After retrieval, Chinese Patent No. CN109607710A discloses a rotary continuous capacitive deionization desalination device. By changing the working structure of the capacitive deionization desalination device, the purpose of continuously desalinating water in the adsorption flow channel of the capacitive deionization desalination device and obtaining continuous and stable pure water at the outlet end of the adsorption flow channel is achieved, effectively improving the desalination efficiency of capacitive deionization. Although the above patent product realizes continuous desalination, the gap between adjacent conveyor belts may cause water flow short circuit, affecting the desalination efficiency; and the contact time between the electrode and the water flow is limited, and some ions flow out of the device before being fully adsorbed. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-stage capacitive salt dialysis device for reclaimed water treatment in order to solve the above problems.

[0005] The present invention realizes the above purpose through the following technical solutions. A multi-stage capacitive salt dialysis device for reclaimed water treatment includes a treatment water tank for capacitive salt dialysis of reclaimed water and a placement rack for placing the treatment water tank. A plurality of the treatment water tanks are provided. An adsorption and desalination component is arranged inside the treatment water tank. The adsorption and desalination component includes a first electrode plate and a second electrode plate. The structures of the first electrode plate and the second electrode plate are, from the inside to the outside in sequence, a modified activated carbon layer, an ion exchange membrane layer, and a nano-metal catalyst layer. A flow disturbing plate is arranged at the top end inside the treatment water tank.

[0006] Preferably, the placement rack is arranged in three layers, and three of the treatment water tanks are arranged on each layer of the placement rack.

[0007] Preferably, water inlets are arranged at the top ends of the treatment water tanks, and water outlets are arranged at the bottom ends of the treatment water tanks.

[0008] Preferably, the water inlet of the treatment water tank on the topmost layer of the placement rack is connected to a total water inlet pipe, and the water outlet of the treatment water tank on the bottommost layer of the placement rack is connected to a total water outlet pipe.

[0009] Preferably, a connecting pipe is provided between three of the treatment water tanks in the same vertical column, and two ends of the connecting pipe are respectively connected to the water outlet of the upper treatment water tank and the water inlet of the lower treatment water tank.

[0010] Preferably, the first electrode plate is arranged in a wavy shape, and a plurality of the first electrode plates are arranged staggeredly. The second electrode plate is arranged in a honeycomb shape and is arranged below the first electrode plate.

[0011] Preferably, the spoiler is arranged inside the treatment water tank and is located at the top end of the first electrode plate.

[0012] Preferably, the spoiler is arranged obliquely inside the treatment water tank, and the inclination angle of the spoiler is 30-45°.

[0013] Preferably, the length of the spoiler is the same as the internal width dimension of the treatment water tank.

[0014] The present invention has the following beneficial effects:

[0015] 1. The composite electrode material composed of the modified activated carbon layer, the ion exchange membrane layer, and the nano-metal catalyst layer enhances the adsorption capacity for various ions;

[0016] 2. The connection structure between multiple treatment water tanks on the placement plate combines parallel connection and series connection, which can not only increase the desalination depth but also take into account the treatment water volume, further improving the treatment efficiency;

[0017] 3. The arrangement of the spoiler enables the reclaimed water to be in full contact with the electrodes, effectively improving the desalination efficiency and the removal ability for special ions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional overall structure diagram of a multi-stage capacitive salt dialysis device for reclaimed water treatment proposed by the present invention;

[0019] Figure 2 is a schematic overall structure diagram of a multi-stage capacitive salt dialysis device for reclaimed water treatment proposed by the present invention;

[0020] Figure 3 is a schematic structure diagram of a treatment water tank of a multi-stage capacitive salt dialysis device for reclaimed water treatment proposed by the present invention;

[0021] Figure 4 is a schematic structure diagram of a treatment water tank of a multi-stage capacitive salt dialysis device for reclaimed water treatment proposed by the present invention;

[0022] Figure 5 is a schematic structure diagram of an electrode plate of a multi-stage capacitive salt dialysis device for reclaimed water treatment proposed by the present invention.

[0023] In the figure: 1, placement rack; 2, treatment water tank; 3, adsorption desalination component; 301, first electrode plate; 302, second electrode plate; 303, modified activated carbon layer; 304, ion exchange membrane layer; 305, nano metal catalyst layer; 4, spoiler; 5, main water inlet pipe; 501, main water outlet pipe; 6, connecting pipe; 7, water inlet; 701, water outlet. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0025] Embodiment 1:

[0026] Referring to Figure 1-2 , a multi-stage capacitive salt dialysis device for reclaimed water treatment, including a treatment water tank 2 for capacitive salt dialysis of reclaimed water and a placement rack 1 for placing the treatment water tank 2. A plurality of treatment water tanks 2 are provided. An adsorption desalination component 3 is provided inside the treatment water tank 2. The adsorption desalination component 3 includes a first electrode plate 301 and a second electrode plate 302. The structures of the first electrode plate 301 and the second electrode plate 302 are, from the inside out in sequence, a modified activated carbon layer 303, an ion exchange membrane layer 304, and a nano metal catalyst layer 305. A spoiler 4 is provided at the top inside the treatment water tank 2.

[0027] In this embodiment, it should be noted that: the first electrode plate 301 and the second electrode plate 302 are composite electrode materials composed of a modified activated carbon layer 303, an ion exchange membrane layer 304, and a nano metal catalyst layer 305.

[0028] The modified activated carbon layer 303 has a large specific surface area and a rich microporous structure, which can provide a large number of adsorption sites and enhance the adsorption capacity for various ions; the ion exchange membrane layer 304 has good ion selectivity and can selectively allow specific ions to pass through according to needs, improving the removal efficiency of target ions; the nano metal catalyst layer 305 can accelerate the electrochemical reaction on the electrode surface and improve the activity and stability of the electrode.

[0029] When preparing the electrode layer, the activated carbon raw material is pretreated to remove impurities, and then a chemical modification method, such as impregnation, doping, etc., is used to introduce specific functional groups to improve the adsorption performance of the activated carbon. Then the modified activated carbon is mixed with a binder to form a uniform slurry, which is coated on a conductive substrate and dried to form the modified activated carbon layer 303;

[0030] Select a suitable ion exchange resin (strong acid cation exchange resin, weak acid cation exchange resin, strong base anion exchange resin, weak base anion exchange resin), dissolve it in a solvent to form an ion exchange membrane solution. Uniformly coat the solution on the surface of the modified activated carbon layer 303, and after drying, cross-linking and other treatments, form an ion exchange membrane layer 304 with good ion selectivity;

[0031] Finally, use methods such as chemical deposition or physical vapor deposition to deposit a layer of nano metal catalyst, such as nano silver, nano copper, etc., on the surface of the ion exchange membrane layer 304 to improve the catalytic activity of the electrode.

[0032] Example Two:

[0033] Different from Example One, referring to Figure 1-2 , this example also has the following further content: The placement rack 1 is set in three layers, and each layer of the placement rack 1 is provided with three treatment water tanks 2. Water inlets 7 are provided at the tops of the treatment water tanks 2, and water outlets 701 are provided at the bottoms of the treatment water tanks 2.

[0034] The water inlet 7 of the treatment water tank 2 at the topmost layer of the placement rack 1 is connected to the total water inlet pipe 5, the water outlet 701 of the treatment water tank 2 at the bottommost layer of the placement rack 1 is connected to the total water outlet pipe 501, and a connecting pipe 6 is provided between the three treatment water tanks 2 in the same vertical column. The two ends of the connecting pipe 6 are respectively connected to the water outlet 701 of the upper treatment water tank 2 and the water inlet 7 of the lower treatment water tank 2.

[0035] In this example, it should be noted that: The three-layer placement rack 1 and the multiple treatment water tanks 2 placed on it together with the total water inlet pipe 5, the connecting pipe 6, the water inlet 7, the water outlet 701, and the total water outlet pipe 501 form a connection structure of parallel and series.

[0036] The water inlets 7 of the three capacitive salt dialysis treatment water tanks 2 at the top of the placement rack 1 are connected together, the water outlets 701 of the three capacitive salt dialysis treatment water tanks 2 at the bottom of the placement rack 1 are also connected together, and the three vertical treatment water tanks 2 in the same vertical column are connected to the water inlets 7 and water outlets 701 of adjacent two treatment water tanks 2 through the connecting pipe 6. The reclaimed water enters the three treatment water tanks 2 at the top of the placement rack 1 for treatment at the same time, and then the reclaimed water enters the next treatment water tank 2 through the connecting pipe 6 at the bottom of each treatment water tank 2 for independent capacitive salt dialysis treatment. The treated water is then collected and discharged through the total water outlet main pipe 501, which can not only improve the desalination depth but also take into account the treatment water volume.

[0037] Example Three:

[0038] Referring to Figure 1-5, compared with the first embodiment and the second embodiment, in this embodiment: the first electrode plate 301 is arranged in a wavy shape, and a plurality of first electrode plates 301 are arranged in an interleaved manner. The second electrode plate 302 is arranged in a honeycomb shape and is disposed below the first electrode plate 301.

[0039] The spoiler 4 is disposed inside the treatment water tank 2. The spoiler 4 is located at the top of the first electrode plate 301. The spoiler 4 is arranged obliquely inside the treatment water tank 2. The inclination angle of the spoiler 4 is 30 - 45°, and the length of the spoiler 4 is consistent with the internal width dimension of the treatment water tank 2.

[0040] In this embodiment, it should be noted that: the first electrode plate 301 is designed in a wavy shape, and the second electrode plate 302 is arranged in a honeycomb structure, which can increase the contact area between the electrode and the reclaimed water. At the same time, the interleaved arrangement of a plurality of first electrode plates 301 forms a tortuous flow path for the reclaimed water inside the device, prolongs the contact time between the reclaimed water and the electrode, and improves the treatment effect.

[0041] The inclination angle of the spoiler 4 is between 30 - 45°, which can guide the water flow to flow obliquely, cause the water flow to rotate and be disturbed, and enhance the contact effect between the water flow and the electrode.

[0042] Salinity sensors, pH sensors, flow sensors and other multi-parameter sensors are installed at the water inlet 7, water outlet 701 and key internal positions of the treatment water tank 2 to monitor the water quality and operating parameters of the reclaimed water in real time. The salinity sensors, pH sensors, and flow sensors are all connected to an external PLC controller for telecommunication to establish an intelligent control system, and automatically adjust parameters such as the voltage and current of the electrode, the flow rate of the reclaimed water, and the regeneration cycle according to the data fed back by the sensors to ensure that the device can operate stably and efficiently under different water quality and water volume conditions.

Claims

1. A multi-stage capacitive salt dialysis device for reclaimed water treatment, comprising a treatment water tank (2) for capacitive salt dialysis of reclaimed water and a placement rack (1) for placing the treatment water tank (2), characterized in that: The treatment water tanks (2) are provided in multiple numbers. An adsorption and desalination component (3) is provided inside the treatment water tanks (2). The adsorption and desalination component (3) includes a first electrode plate (301) and a second electrode plate (302). The structures of the first electrode plate (301) and the second electrode plate (302) are, from the inside to the outside in sequence, a modified activated carbon layer (303), an ion exchange membrane layer (304), and a nano metal catalyst layer (305). A flow baffle (4) is provided at the top end inside the treatment water tank (2).

2. The multi-stage capacitive salt dialysis device for reclaimed water treatment according to claim 1, wherein: The placement rack (1) is provided in three layers, and each layer of the placement rack (1) is provided with three of the treatment water tanks (2).

3. The multi-stage capacitive salt dialysis device for reclaimed water treatment according to claim 2, wherein: Water inlets (7) are provided at the top ends of the treatment water tanks (2), and water outlets (701) are provided at the bottom ends of the treatment water tanks (2).

4. A multi-stage capacitive salt dialysis device for reclaimed water treatment according to claim 3, characterized in that: The water inlet (7) of the treatment water tank (2) at the topmost layer of the placement rack (1) is connected to a main water inlet pipe (5), and the water outlet (701) of the treatment water tank (2) at the bottommost layer of the placement rack (1) is connected to a main water outlet pipe (501).

5. The multi-stage capacitive salt dialysis device for reclaimed water treatment according to claim 4, characterized in that: A connecting pipe (6) is provided between three treatment water tanks (2) in the same vertical column. The two ends of the connecting pipe (6) are respectively connected to the water outlet (701) of the upper treatment water tank (2) and the water inlet (7) of the lower treatment water tank (2).

6. The multi-stage capacitive salt dialysis device for reclaimed water treatment according to claim 1, wherein: The first electrode plate (301) is arranged in a wavy shape, and a plurality of the first electrode plates (301) are arranged in an interleaved manner. The second electrode plate (302) is arranged in a honeycomb shape, and the second electrode plate (302) is arranged below the first electrode plate (301).

7. A multi-stage capacitive salt dialysis device for reclaimed water treatment according to claim 1, characterized in that: The flow baffle (4) is arranged inside the treatment water tank (2), and the flow baffle (4) is located at the top end of the first electrode plate (301).

8. A multi-stage capacitive salt dialysis device for reclaimed water treatment according to claim 7, characterized in that: The flow baffle (4) is arranged obliquely inside the treatment water tank (2), and the inclination angle of the flow baffle (4) is 30 - 45°.

9. A multi-stage capacitive salt dialysis device for reclaimed water treatment according to claim 8, characterized in that: The length of the flow baffle (4) is the same as the internal width dimension of the treatment water tank (2).

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